Improvement in reciprocating steam-engines



JOHN S HEPHERD &c. A. CLARK.

Improvement in Recrproating Steam Engines.

No, 124 980. Patented March 26,1872.

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1 "Que. WM L UNITED STATES PATENT QFFICE.

- JOHN SHEPHERD AND CARLOS A. CLARK, OF BLOOMFIELD, IOWA,

IMPROVEMENT IN RECIPROCATING STEAM-ENGINES.

Specification forming part of Letters Patent No. 124,980, dated March26, 1872.

Specification describing a new anduseful Improvement in SteamReciprocating Engines, invented by JOHN SHEPHERD and CARLOS A. CLARK, ofBloomfield, in the county of Davis and State of Iowa.

The object of this invention is to simplify and improve the steam-engineand it consists in the construction, arrangement, and combination ofparts hereinafter described.

The accompanyingdrawing represents avertical longitudinal section of anengine constructed according to our invention.

Similar letters of reference indicate corresponding parts. l

A is the steam-cylinder. B is the piston-rod working through astuifing-box iu the cylinderhead in the ordinary manner. C C are pistonson the rod B. D is the steam-chest. E E are the steam-ports. Thesteainchest is an open cylinder, and F F are piston-Valves workingtherein over the steam-ports on the valve-rod G.' H is the exhaustport.I is the steam-pipe.

It will be seen that the water of condensation, as well as the steam, isdischarged twice at every stroke or revolution of the engine.

By this arrangement there is no place for waste steam, and the pistoncannot be retarded by the water of condensation, as the'latter finds itsway to the exhaust-port by its own gravity.

This makes a very material difi'erence in the effective power of theengine, while steam is economized.

If desired the steam-chest and cut-ofl valves or pistons and theinduction-ports might be

